John: Email & Phone Number

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Information Security Principal at Children's Hospital of Philadelphia|Warrington, Pennsylvania, United States

Position:

Information Security Principal at Children's Hospital of Philadelphia

Location:

Warrington, Pennsylvania, United States

View John's Email

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Last updated: 2026-10-18

Updated: 2026-10-18

Found email addresses for John:

Business emails:

j**n@mcgratton.com,

j****r@addr.com

Personal emails:

d********n@gmail.com,

d********n@hotmail.com,

j********n@erols.com

Found phones for John:

+1-870-***-**45,

+1-909-***-**42,

+1-205-***-**35,

+1-909-***-**87

A different John?

Work Experience 25 years

Information Security Principal at Children's Hospital of Philadelphia

May 2026 - Current

Information Systems Security Officer at DLL

Mar 2023 - May 2026

Principal Cyber Defense Threat Intelligence at Constellation

Feb 2022 - Mar 2023

Cyber Security & Compliance Lead at Exelon

Jan 2016 - Feb 2022

Vulnerability Management Program Manager at Exelon

Sep 2012 - Jan 2015

Lead Security Analyst at Exelon

Sep 2010 - Feb 2012

Sr. Security Engineer at Toll Brothers

Dec 2007 - Oct 2010

Sr. Network - Security Engineer at NMSLabs

Jan 2005 - Jan 2008

IT Network Engineer at Citi

Jan 2001 - Jan 2005

John started working in 2001, then the employee has changed 6 companies and 8 jobs. On average, John works for one company for 2 years 8 months.

Their professional focus is Attack Surface Management, Cisco Technologies, and CISSP across 3 core areas.

John holds Certified Information Systems Security Professional (CISSP) and Global Industrial Cyber Security Professional (GICSP) certifications.

Education

Master's Degree at University of Maryland Global Campus

B.Sc. Information Technology at Peirce College

Frequently Asked Questions

What is John's email address?

SignalHire found verified email addresses for John, both business and personal. Their business email is j**n@mcgratton.com, and personal emails include d********n@gmail.com, d********n@hotmail.com, and j********n@erols.com.

What is John's phone number?

SignalHire found multiple verified phone numbers for John: +1-870-***-**45, +1-909-***-**42, and +1-205-***-**35.

How do I contact John at Children's Hospital of Philadelphia?

You can reach John through SignalHire by unlocking their verified email and direct phone number (free signup, no credit card needed). SignalHire is the fastest route if you need their contact details immediately.

What is John's professional background?

John has 25 years of professional experience. They have held roles including Information Systems Security Officer, Principal Cyber Defense Threat Intelligence, and Cyber Security & Compliance Lead at companies such as DLL, Constellation, and Exelon. Their education includes Master's Degree from University of Maryland Global Campus, and B.Sc. Information Technology from Peirce College.

Is John's contact information up to date?

Yes. John's SignalHire profile was last updated on 18 October 2026, reflecting their current position as Information Security Principal at Children's Hospital of Philadelphia in Philadelphia, PA, United States.

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